Pipe-line-cleaning device



1,631,562 J- M.-THOMP$ON ET AL PIPE LINE CLEANING DEVICE June 7, 1927.

Filed Sept. 19. 1923 s Sheets-Sheet 1 June 7 7.

J. M. THOMPSON ET AL rjIPE LINE CLEANING DEvIcE Filed Sept. 19, 1

925 5 Sheets-Sheet 2 //v vz/v rams.

June 7 1927.

J. M. THOMPSON ET AL PIPE LINE CLEANING DEVICE 3 Sheets-Sheet 3 v Filed Sept. '19, 1923 IN VE/VTOA5.

seemed June 7, 1927'.

Joan miufioiasson mowmmm Hij'T eme er eeamsogmwwere,

r PIPE-L'mEwnEANiNG nE'VrcE-w a A -ucauomfimasepfemiber 19,192.25 ser l m; 663,646 i Thisinvention -relates to apparatus fo'rr use 1n= cleaning pipe linesv or mains, 'angh more particularl-y to devices Of tlHSkIIICh which are moved through the pipe by means 7 within the pipe.

The objects of this invention are to proride a cleaning device 0t this kind-"Which is adapted to'he adj usted to fitpipes of 'diiTe-F 10 ezwclianieters; also sto -providea. device'of this kind which isadapted to be contracted beforeinsertion-into a pipe andyto be ex panded'arfter it is positioned'in the pipe, so

as to facilitate the placingIOf the device into the pipe; also to provide devices of? thiskind-with means of ii'nproved construction for cuttingor removing thedepositor coat ingot foreign material; from the interior of improved construction for. automatica 11y. re-- 30 lieving any-excessive Waterpressure acting.

on the device to force it through-a pipe-,and a'tnthe sametnne to prov1de-water-t0 the cuttersfor flushing out oiv;removing the;I material cut from the pipegg also to. provide 1 blein such '-a; rna nner th at: the ham ma he,

fi ifeht 1* means of improved constructionfor{ removably mounting the cutters Ont-he" ii'ra'inepf the cleaning' device;- alsoto: provide a device 7 of this hind with' a plunger Of-llD PIOYQd 7 construction also to-provide cuttingj means;- of iii'iprox' ed construction for use in connec o'cleaning devices'ofthis kind; also to improve the constructi'onof -,cleaning de respects *herein cutting'partsof the deriiicef are renioi abl mounted on the frame so that if; the device- 1 vices of this kind in other I a't'terspecified:

T n the accompanying drawings a Fig-LII is-a longitudinal View of; pipe. cleaning device embodying this invention' the extneniefrontend of the devicebeingomittedand the parts being adjusted fori V rel atiyelj I l arge pipe.

is} a fragmentaryrtransverse-View;

of the pressure of the water or other fiuid thereoff I supporting block a cutters secured; thereto.

the pipe; also to provide ineanso'f i1npr0ved- ;0f theicuttingdevice. construction for supporting. the cleaning-de 'VlCG in a pipe in such a manner that the out tersqo'r scrapers can effectively Fact. on-"all,

J means of improved iconst'r-uction' for guiding the device acrossbranch pipes or'otherjir regularities in the pipe; also to j providea cleaning device of this kind with means-0f UPP? others.v

Figs 2 1 is v r a fragmentary 5 sectional View thereof on an'enlarged-scale, ShOWIIIgDDG of Fig. li-i's ai longitudinal centralsectionalI elevation ol the plpe'. clean ng device in} justed for a smaller pipe.

F103, 5 's :a "fragmentary,

place in agpipe and showing the part adpartly in section, "onllinef I" "sectional uiew.

thereof on line 5 5, 4', sho ing ai sup-Q portl-ngbl-ock for. mounting some of the cut ting: parts of the device on the i fram Fig.- Glis ayview i 7 is a side View D ane sppporeiif block show ng the supporti'ng'jplate for the zFig 8 aperspectiYe view Off oneiofdthe-i guide projections; arrangedat the front end ..r ee n e: eii .r or the cleaning rdev ce onl e 9" 9, Fi 1;

Fig. 10 1SFL rear lQW thereof, porti' Fig; 9 is transverse broken a a H a F g. llgsa fragmentary detailed longi tud nal V ew of one oithze cutters thereofl ,Iilg v121s fragmentary perspective View. showln one of the cutters arranged-- on its v e p at a: Briefly istatedy adapted to cooperate with pipes; of

the cleaning deviceernbodyingithis' lnventionmcludes a frame OI' gj [supportingmember on gWhlCh the va rious of the, insid as of t:

:of th flexible collar of-tln; plungerjbeing f diametersy fand 1 gb1ef the: cleaning device to beicontracted when. the same is to be plaeed into a pipefanjd expanded when; 'itIiS POSl-tlOIIQCl in the pipe-to press the'vaa,

951., ri'ous cutting partsQOf the deViCe "into 'en-f gagem'ent with the inner periphery 'oft-he.1 I pipe withithe idesiredtension. "Some-"of thee.

isto be usediton pipes ofdifi'erent sizes, these cuttingparts can be, readilyfremoved from the [supporting The adjustable fr e a d la 3, 1

partsof-the devicelareinountedthe body; a 110.

portionshown includinga plurality of angle,

7 bars four being used. in the embodiment of the invention illustrated inthei'drawings;

These angle bars extend lengthwise of the cleaner and the ends of the bars are rigidly secured to front and rear fittings or end.

pieces a and a. The angle bars, in the con; struction'gshown, are so arrangedxthatthe 7 legs of the bars form four spaces or channels, and for this purpose the angle bars.

are'fitted into rectangular depressions formed '3 s between 'sh ort' radially extending arms or V plOjections m of the'end pieces, the angle bars being secured to the arms by any suitable means, such as rivets orthe like'a Thefront end piece a may be provided with" "a hole afito receive abolt ofa clevis (not shown) or-other suitable attaching device,

in case itshould be desired to'pull the device through a. Pipe, The rear end piece a is provided with a tubular projection .01 part a adapted to receive a plunger for forcing the devicethrough apipe by means of the pros sure of the. liquid in thepipe'.

. The cleaning device is, provided with a ;plurality of parallel supporting bars "B'on which'fs'omeiof the parts of the device which are intended toact on a pipe are mounted 'an d' which may be of any desired construcf ation,,thoseshown being of substantially T- frangd in'substantially radiatplanes with V r'efe'ren cel to the body of "the" pipe cleaner, ;thus presenting the flanges-'b ina position .shapedorossfisection and ,havingwebs 1) arto .receivethe various pipeengaging parts tobe mounted thereoni -Any desired number'of thesesupporting bars may beprovided, four beingshown' in the construction illustrated, andthe supporting bars are adpose,i feach of these supporting bars/is connected tothe flanges-of two adjacent angle bars ofthe' bodyportion by means of two or.

more parallel links C, the outer ends "of whichare pivotally connected to theiradially arranged webfb of a supporting bar by means of pivots c or'jt he like; The inner ends of the-parallellinks are connected to the flanges 'ofthe angle bars A by means of pivots c.

v j Theseiparallel links may 'beof any desired construction,those" shown including-hub por- V tions c arranged between the flanges of ad? ja'cent angle bars and-pivoted thereto, and bifurcated" outer portions which's'traddle the legs of the supporting bars.

The adjusting of the parallel supporting. bars relatively to the central bodygportion of'the'cleaner may be effectedyas shown in the drawings, by means of a toggle vor 'ad-v justing links D. ,The outer endsof'these,

links are connected to the radial webs b of the supporting bars by means of the pivots 0 (see Fig. 4) and the inner endscof the links are pivotally connected to an ad .justing block or nut E, which, inthe construction shown, is movable, lengthwise of the body portion of the cleaning device. The

adjustable block shown, see particularly Fig.

a, has'angle-shaped recesses into whichthe corners of the angle bars A are adapted to enter to guide the block E in its movementf with outwardly. extending arms orprojec tions 0 to which the inner ends of the toggle links D arepivotally connected. A central adjusting screw shaft-F, the opposite ends ofwhich are 'journalled in the end pieces r1, 'a ,'has a threaded engagement in a central hole in the. achustmg block or nut E, so" that by turning the screw shaftthe ad and'this block is preferably also provided" justing nut or block may be moved endwise ofthe body portion'of the frame. Therear end of the screw shaft is provided with a part f adapted tobe engaged by a socket Wrenchfor thelike f. shown in dotted lines "in Fig. 4:, forturning the screw shaft. Collars f and f secured to the screw shaft are 7 U adapted to bearagainst the end pieces of the body portion to prevent endwise movement of this shaft' It will be understood that at' different distances from the body portion of the cleaningdevice so" that the cleaning device can be readily z-idjusted for .pipesof different'diameters, and so that the cleaning device may becontracted before it is inserted into a pipe and then expanded-to the desired extent-L by. means of the construction described. the parallel supporting bars maybe posltioned In order to support the device in a pipe i in such amanne'r' that the upper portions of' the pipe will be acted upon by the cleaning device to substantially the same extent as the lower portions, each of'the supporting bars is preferably provided with spring surface of the pipe to hold the cleaning device in the desired position within the pipe. In the constructionshown for this purpose, a leaf spring or spring plate G is employed,

the middle portion of which is mounted on a supporting block 9 secured on ,a support- 1ng bar, and at the ends of each "spring. rollersor wheels H areprovided, These wheels, in the construction shown, are 'mounted upon pivots or pins h, the ends of llll *pressed rollers adapted to engage the inner which extend through holes in U-shaped' frame members 71/ which are'secured'totheends of the springs. 'The spring plates G are suflicie'ntly fiexibleso as to permit the rollers H to ride over any obstructions in the interior of the pipe, and the springs are stiff enough to support the cleaningdevice in asubstantially central or axialipositio'n v I in a p'i'p'tgsothat the scrapmg and cutting members of the'cleaning; device will act on deposits or accumulations onthe'upper pore tions' of the pipe as well as *on" the lower parts thereof;

Preferably the wheels '01-" rollers H are mounted to more sidewise on" the pivot pins II; to 'en'ablethe rollers orwheels"to niove laterally enter the way of obstructions;

For this purpose, in the construction shown,

r a coil'spring. h 'is arranged at'each side of each roller- H," and. the rollers are loosely mounted-ion the pins h, The mnerends of the coil springs h? preferably engage conical or "cup-shaped centering bushings h which engage; in corresponding conical or cup shapeddepressions inth'e sides of the rollers andithus tend to supporttherollers-centralrollers are normally centrally and axially supported on the pins, but arepermitted to,

I yield'soas topass'obstruetionsin'the pipe.

' the supporting. bars B by anyrsuitable' "meansy such as bolts Z and ZL By removing these bolts, the saddle members, together with the platesand scraping or. cutting 7 Apluralitypfspring pressed scraping'or cutting devices" are removably' mounted on the supportingbars B in such amanner that these devices can be readily removed and replaced. byfscraping I or cutting devices adapted for -11S61I1 pipes of different 'diameters. In the construction shown for this purpose. each of the supporting bars B is provided withone or more plates I'whiclr are removably mounted. on thesupporting bars andon which anumber of cutters or scrap'ers'K are" secured. The front edges 2 of these scrapercarrying plates aresharpened so as to cut any material in the pipe with which these edges mightcome into contact. The plates may be secured to the sup-" porting bars B in any suitable or --desired 1nanner,- those shownbein'g rigidly secured to theputer faces of saddle members or partsL which arefdetachably mountedon members mounted thereon; maybe removed from the supporting bars Band replaced'by other plates. The plates are curved" to co- 'operatewith a pipe or" acertain diameter and-if a pipe of another diameter )is to be cleaned. 'the' plates are'removed from the supporting bars B and replaced by plates of different size and curvature In order to securely hold these saddle members on the supporting'bars B," the saddle members are preferably provided with longitudinal slots or recesses Z into whi'chthe supporting bars B may enter.

beef any desired constri'ict'i'on, those shown including a" scrapingr-orcutting blade "70' which is pivotal-1y mounted on the plate I. V

For this purpose. each of the blades is may pin extendslf This pivot pin connects the" bracket k" with a similar bracket/ 6 1 secured erably provided about the is? and is 0011- toithe plateLjand a-coil spring is is pref nected toeacho'tthe brackets insuch a man I neras to" normally-' support the scraping} I blade lcfin asubstant-iali-y upright" position,

asshownin-full liiiesin Fig; 11, The outer ed'ge's k 'of the scraping blades are sharp T ened and may; benotchedas shown in Fig. I l2, to'scarifythe mater al n:thepip e;-orwi may have flat cutting edges. As shown; in j Figsfl and 4, preferably two rows ofblades are-m unted on each or the plates 1', and-the scraping bladesof the front row are notched, f the [scraping blades 'ofthe' rear row having unbroken cutting edges, The cuttingedges I of theblades are slightlycurved in accord-I i ance with the inner 'dia'n'ieter of the Pipe with which the blades are; adapted to --co-' operate; By means of the oonstru'c'tion dew.

ward'l'y" as they strike" obstructions inthe seri lied;"the scraping blades may. swing'rea'rk position! The lowered'ges 7a of the blades are adapted-toengage the plate I'tolform stops to hold the blades in their normal post tions." Thebl'ades 7c are preferably "detach- 1 ably'se'curedto the "brackets kso'that the blades may be" readily removedand replaced the plates on'adjace'nt supporting bars B will" overlap slightly and the blades mount-- ed on-the plates are preferablystaggeredin v their arrangement so as to insure the scrap-9 111g blades ZLCU HgOH all portions of the in:

ner periphery ofthe pipe-x Intheconsuc:

, tion shown, two plates 1 are' nounted on 9 each "of the supporting bars 13, but it will I be understood that any "desired-numberof plates maybe used inconhection with the scrapers are so'tlesi'gnedt-hat the combined action of the springs on the inner surface of a pipe is less than the Comb action Ofthe rollersup'porting springs G,"so that the latter springs will" insure the scrapers acting with sufiicient force on th'ehpper portions vofthepipe. It will be-understood thatit I I I the pipeas well as for properly supporting The scrapingor cut-ting members K'may' i ill-3 j cleaningfdevice; The springs acting on the .the same in the pipe, andif desired, the 3g guide rollers mayf be entirelyoinitted, as may be advisable if the deposit of foreignmaterial is mainly in the lower portion of thepipe.- Means are preferably provided forguidl V ing the cleaning device in such a manner as supporting bars B. The rear ends of these inwardly, as clearly shown in: Fig. 4. These; c guide members are secured to saddle pieces; which in turn are secured to thefront' i 'endsof the supportingbars B. Preferably guide fmembers may extend substantially parallel with the axis of the cleaning device, a and the front portions thereof curve "Ithe guide members M. are of substantially T-shaped cross section j and afiange m/of 7 these members extends outwardly radially A erjably atreach side o'f-the radial tlai1ge0zt, and serveto further out any obstructions" "which may be encountered. 5 Other means fi'or guiding the cleaningdevices through a "pipe may beprovidechif desired.

rush I 'hnb portion n removably mounted on ;the

:an'dis sharpened at its outer edge so as to, 1 "cutanyobstructions which may be encountered 'by these guide" members during the assage of a cleaning device through a pipe.

referably a pair of cutters m? having cutting edges m at thelr frontends are .remov ably secured on thef guide members'M, pref Inorderfto drive the cleaning men'ibcr,

through a pipe, it is generally customary to" providea plunger or the like with which the liquid in the pipe engages to force the cleane ingdevice through the pipe, such means be ing generally employed iii-cleaning waterv mains where waterunder considerable pressure is available. In our improved cleaning device, the vplunger serves not merely to niove the'devicerthrough the pipe, but also togive the'interior of the pipe a final scraping-or cleaning; In the particular construction shown this v lun -er includes a metal I v P a or base N \vlnch is provided Witha endof the. tubular extensiona of the rear end piece a, a set screw vibeing preterably provided to secure the plunger on the tubu- 'lar extension of the bodyportion of the cleaner. The outer portions of the disk'N are preferably taperin or ii'rusto-conical in form and a plurality of scraping or cutting strips or blades Ov are rigidly secured thereto, the outer portions of the strips being curved outwardlyas shown at 0 andthe extreme ends 0 of the blades being sharpened soas to scrape the interior ot a pipe through which the device-maybe passed. Thesescraping blades are placed so closely togetherthat the edges thereof cover nearly the;entire inner periphery ofthe pipe, and

these devices are made of spring' metal so 7 that they are forcedto bendLinwardly in case they strike obstructions in the pipe. .In addition to cleaning and scraping the pipe, these scraping blades 0 also serve to sup: port a flexible diaphragm or collar P which is arrangedion the plunger, and the outer edges or which extend beyond tl16' Sp1iing blades and cooperate with the inner periplr' ery v0t the pipe to form a substantially ff ;liquid-tight joint. The flexible collar P of a,

the plunger is secured at its inner portion to i the disk N and the intermediate portions thereof are supported by the spring blades" O. Consequently, the pressu'i e'of theiliquid. acting on the flexible'meniber. P tends to outwardly against the'pipe. v p c In cleaning deviceslof "this kind it is de sirable to permit a part of the water acting on the plunger tofpass beyond the plunger for the purposeof washing or fiu'shingiout the pressureacting on the plunger', which is generally desirable in cleaning water mains, since the waterpressureis generally greater than desirable tor'athorough cleaningof 1e piy'iesrv In theconstru'ction shown" for ,1 I this purpose, the disk N 'isprovided with press the sharpened edges o1? theblades i any of the material which has beencut from the interior.ol the pipe.- The admission of the Water also serves to reduce somewhat a seriesoi'i holes or orifices Q, each oi which i is controlled by a valve or stopper R; andmeans are preferably provided for yieldingly holding these valves or stoppers on;

their seats to normally close the orifices Q certain niinhnui'n' is'exerted on theplu'ngeii'. Any suitable or desired means may be employed for this purpose, those shown in the drawings including a plate r to whichfthe except when liquid pressure in excess of a;

stopper valve is connected and which isf guidedby means of pins r insuch a manner as to permit the stopper to movetowarcljand'i'rom the orifices Q. Springs 9' yieldingly"press the plate '1- in a direction to hold the valves or stoppers in their closed positions until a certain minimum 7 liquid to close the stopper or vali'e R, and these springs are preferably of'su'ch strength as pressure has been reached or exceeded, l

whereupon the val'vjesor stopperswill open and permit liquidto flow throughthe orilices Q and to flush the material cut from the pipe so that this material will flow in the pipe ahead of the cleaning device. The

auton'iatically controlled valves or stoppers have the advantageot remaining closed in case the liquid pressureiis low and thus pre-v vent the escape of any liquid through the orifices Q which might be'necessary to force the cleaning device through the'pipe. These cleaning devices wlienused in connection with the cleaning of water mains or other fllong pipe lines vare generally inserted into the pipe; and after the pipe has been closed and the Water pressure applied, the water pressure alone is'depended upon to move the cleaningidevice through a pipe. If-for any reason the Water j pressure? becomes exces- 'slvely iow the valves-or stoppersyan the 1 "Construction showmremain closed so that all I of the liquid pressurewvillbe available to force the'deviee through the pipe; r

In order to tacilitat the fiushing-of material cut or serapedirom'thepipeand to I V prevent ,this'm'aterial from lodglng on parts of the eleaning device, the various-saddles or' blocks mounted on the supporting bars {B preferably taper rearwardly asis shown *inFigs; 5 'an'dG- in-eomieet-iori with the saddles L. The saddles'm and g-are's'imi- 'larly' tapered rearvvardly so that the liquid vdischarged through the orifices Q, will -rr'1f0re 'readilyfflow past the saddles and so I that "thesadd'les Willwnotcatch any deposit-re- .V" H1OVBC1I YTF I"OIII the; interior of the (pipe. {In

h IOfthe'cleaning device described, after-the size; of the-pipe Whichis to be Cleaned has been*'determined,*plates I 'Wl-T/h the center ,oftthe device so that the seme v will lee-contracted to a smallerndiameter than 'greatly facilitates thein's'ertion kof the de- "vice into a pipe; and after theinsertion; the i central screwshaft F is turned to -move the that of the pipe to' becleanedfi This' very suppdrtingbars outwardly for placing-the desired =amo11nt o f tension -o i 1 thesprings "'Gofqthe. supporting rollers-and-on the "springs which hold-the scraping blades k in place. Theplunger can hie-easily}contracted a in placing the device into'a pipe; since the ,spring' blades '0 exert f, but little pressure downwardly until the li quidf pressure aets i i on the plunger. The gpipeflis then; sea'led up and the liquid pressure applied, 1 whereupon the device anoves:throughthe-pipe. FUn'd'er Lnormal liquid pressure in'flthe pipe, the

' valves or stoppersIR-will he opened to' per- ,mit "suflicient liquid'yto fioW' in the {pipe ahead ofthe plungerto 'flush out the-material removed from thein'terio'r of the pipe,

and when excessive pressure actsfon the plunger, the valves Open tofa-greater extent, "thus serving not o1ily-to fiushthe ma terial; butjals'o' to reduce the pressure acting; on the plunger" so jthatfthe device'- 'Will fl pas srthrough theipip'e slowly enou-ghfzto hand; the pressure i is 110W so that there-may tl'irouglr the pipes The rearvvarrdly tapering sprayed against them soas to help in; the

thoroughly clean the If, "on the *{be danger of the deyiee beeomingflodgd inth'e pipe," the{va'1ves remain-"Closed, thus causing en [of the pressure-of the- 'liqu id to; be appli-ed' to the forcing of the device 1 llfaoesfof the varioussupporting hlo'oks serve 1, "to-defleet-indifferent directions,the-Water; v 1 a I i cleaning v of the pipe :"and in keeping fthe V fele'an'lng zdeviee clear. of foreign matter frekmoved from the pipe, and: the shape of these f tapermg faces also prevents any foreignymatter which has been: removed from the pipe from dodging thereon and thusi inter- "fel ing with the fiushingot the materialiere- HIOVGCl 'fLOIII the :p'ipes. :The various cuttiiig many differentyvarieties of material aWlliCh devices; servefithe "purp'oseuo f" eutting-jathe 1 1 may be encountered in the iolean-ing; ;.of the 5 pipes and the various {scraping devi'ees,. sup- ;.p0rting rollers "and the; plungeritseH are iso. :mounted as :to. lre'adily zyield-=Wl1en:1passiiig obstructions in? the pi of:- bran'chafpipes tor theflikfe.

' "WVe claimasiour'inventionz 1 ltion of. a body" portionrhavingzal plurality of a pipe, ap'lungerconnected vsiith the rear ,actedi upon by liquid pressure, moves said cleaning-{device throughsa P1116, and-yielding rzmeans conneetedlzwith saidiplungernfor; perumittingdiquidto floiv f rom thelreanfaeeiof f it --1 said plunger to the front theneof: w'l'ienr the 50f :.scraping deviees :.m0unted- .qthereon and v adaptedfitoiserapedepositsfrom the interior 1 I :1, Ina'pipeeleaning device; the eom'hina I i v i end of: said, body lpocrtionffand;Which, .vIvhen liquid 5 pressure.v reaeh'e'sz a rip'redeterminied 4miniII1unr-t0 permit liquidate-Wash a WayJthe -deposit jremo'ved byesaidscraping.e'deviees from the] pipe. 1:

. 2.""In.a pipe cleaning devicetr'jthe tt-ionv off-a sifram'e having, rigid'lsupporti-ng v 'e .JtheLaXi -"of the devioeltioradaptjtheieleaning f devieeutogoperate"on pipeslotadi-fferntis izes; p'lates detaehably mounted onsaid-support i zing bars and scraping hlades'ionsaidplates; 1 i l bars which are adjustableitotvardiandi:trom

" the;eutti1ig -edges-of said scraping; blades {being shaped to conform withxthe eurvatiire 1 of the pipe :w-itltvvhie'h said" cleaning device is tor-cooperate, setid iplat'es heihgremovable i v to be replaeed 10y 3 plates flhaving fileutte'rsadaptedto 1 'eeo' ":ferent diameter.

8alniaplpezbleaning device,=*theeom'bina-.

"'tion of asupportinglframesubstantially eon- 1 eentrici'with the: pipe, curvedplatesameunted E i edges sharpened, "fan d aoutwardly; iext endingi L -"0nusa-id-t frame and ihaving :itheir front,

,s crapers yieldingly mounted on said} p'late and having' euttingnedges @a'rranged 1in a rr'i-than the euttiaig; ,2

4. Iufa pipe cleaning device,- the co ibinatooperate on pipes bf different sizes, spring scrapers mounted on each! oi" said 'eplates fyand 'having cuttingedges arranged in a circle zofgreater diameter thanthc cutting edgespof said plates, -,a-nd;- means for yieldingl'y" holding said scrapers in their operative position onfsaid plates.

5. Ina pipe cleaning, device,'the coinbination at a supporting; frame and 'a' plurality ot scrapers mounted on said frame,.each of rand-rollers arranged on the ends [of/said saidkscrarmrs including a'scraping blade, a

-bracket en Whichsaid blade is removably :mountedy means for pivotally jlmounting fsaid'ibracket on said-frame, and a spring interposed between said l blade; and said -frarne" for holding said blade normally in an '6.-In. a:pi.pe-cleaning devic ,Eithe combinaand a plurality tionoi-z a supporting drama "."of scrapers mounted on saith-frame, each of said scrapers includ ng a scrap1ngblade,a-

bracket on which said blade is removably -i -.3their front edgessharpeneda plurality of plates mounted intermediate their ends on sa d supporting bars,.and rollers onthe ends of said spring plates and adapted to engage With a pipe for. supporting said cleaning device in a pipe.

10.1n a pipe cleaning bars adjustable towardiand. fromv sup porting device thejaxis ofsaid device to adapt said to operate on pipes ofldifl'erent sizes, blocks mounted on said bars, spring plates secured intermediate oftheir "ends on said blocks,

spring plates and" adapted to-engage the interior o'l a pipe-for positioning said device in apipe. U ii. In a pipe cleaning device, the combination .of' a supporting frame, spring plates mounted on said frame, rollers device, the com 3 .f', I bination oi a supportingtrame ncluding nounted on said, springplates and adapted cleaned, pivots on which said rollers are mounted, and means for'yieldingly holding mounted, abracket mounted on'said frame, a p vot connecting saidbrackets and a'coil is ipositioli toy rr rt :said'scraping'blade in :an operative position.-

i 7-. Ina .plpecleaning device, thecombina Y tion: of a rigid Iframe having "rigid" supports 1 --;,mg bars adapted toibe held in difi'erent.positionssubstantially parallel to saidfiframe 1 and to:each other to adapt the cleaning-Edesupporting at plurality of supporting members ltllBr-JDIPB to-"be ugly-amounted on said, curved supporting -inembers tote pipe to be cleaned. .1 l 1 gage the inner surface of the .v In a1 pipe cleaning device, the combina- .t1on of-a rigid frame having rigidsuppo'rtingbars adapted to be held in difi'erent'posiions 1 ibstantially parallel to saidj frame =ieters,"a pluralityof plates curvediiraccord- *an'ce withthe pipe to-be cleaned and de- 'tachably yieldinglyqmounted on said sup- 1 {binatiom of a suppo I f porting bars,- and cleaning ,toolsmou-ntedon said plates to-engage the inner surlace'ofrthe :ipipe to be cleaned, said; plates being adapted by other plates differenthaving 1 other cleaning tools to be replaced 1 curvature I and rt'ingiframe including supporting bars adjustable toivard and from. 1 the axis of said device tov adapt said device {spring arranged 2 about said pivot for yield- Y ingly. holding "saidfirst' mentioned bracket in e to engageythe interior oi, the pipe; to be said rollers centrally on saidpivotsand perinitting 0f endivisemovernent of said rollers relatively to said pivots. n

4,12JIn a pipe cleaning levice, the combination} of a supportingfframe, spring plates arranged on said frame, rollers mounted on said spring. plates and adapted to engage theyinterior of a, pipe to be ,cleaned, and springs arranged at [opposite sides ofsaid rollers and holding said rollers, .normally' in substantially central positions on saidpivots and permit-ting enClWise move mentof said rollers relatlvelyto sa d p vots.

13. In a pipe cleaning, device, the combinationof roller adapted to engage thef' (inner facebf pipe, a pivot 1 extending loosely through said roller, and ineansyieldingly engaging said roller for supporting reference to said pivot and for yieldingly.

/ l and' to ea'chp-otlier toadapt thecleaning de- 5 vice to, operate on pipes of'difi'erent diarn-- the samenormallyin a radial position with holdingsaidroller substantially inthe mid: dle of said pivot, whereby .said roller may binat'ionof a II'OllGI' adapted to engage the v 14,111 a" 3136 cleanin" device the coin-s l l e a. 115

be moved laterally or the pivot and also. at an angle thereto;

innerface of a pipe; said roller having cen-i trally disposed, substantially. conical recesse's in theeopposite sides'thereof, a pivot extendi ngi loosely through'said roller, cen-E teringfbushings slidably'mountcd on said pivot and a'daptcd toseat in said recesses,

. mounted thereon, to adapt-said pipe clean iiigdevice to operate on pipes of different.

iam'eter.

' 1.9. In a .gplpe cleaning devicefthe comm1. means .for'yieldingly pressing radial ositi'on on said pivot.

porting barsadaptedtobe held in different positions substantially parallelito said frame and to eachother to adapt the cleaninQdesaid buslnngs. into said recesses for maintain' n9; said roller in a substantially centralandeases vice to operate on pipes -o'ffdilferent"diam- .eters, guide members arranged "atfthe front ends of saidbars and extending forwardly an outwardly. extending, Substantially radial flange provided with a cutting edge-,and

cutting members arranged'at opposite sides of said flange and having cutting edges eX- tending transversely with reference to Yth length of saiddevice. I

' 16. In a pipe cleaning device, thecombinaon of arigid frame having rigid supportmg bars adapted tobe held in diiferent'Q ofsp'ring platessecuied'to said edge poit'ion positions substantially parallel to saidframe and to each other to adapt the cleaning device to operate on pipes of different diameters, a plurality of plates curvedsubstantially concentric with the pipe to be cleaned and detachably mounted on said supporting bars, cleaning tools yieldingly mounted on said plates and engaging the inner surface of the pipe to be cleaned, said plates being adapted to be replaced by other plates of difi'erentcurvature and having either cleaning tools mounted thereon, to adapt said pipe cleaningdevice to operate on pipes of different diameter, and guide members rigid ly mounted on the front portions of said bars and extending forwardly therefrom and provided with outwardly extending cutting edges, the front ends of said guide members.

being W ingde'i ice.

17. In a pipe cleaning device, the combination of a supporting frame, a plurality of cutting and guidingmembers mounted on nclined towardthe axis of said clean said frame, a plunger connected with saidframe and adapted to move said frame through a pipe when sald plunger 15 acted upon by liquid pressure, said plunger hav ing an aperture through which water may be sprayed to said cutting members, and

blocks interposed between said frame and said cutting and guiding members and arranged so that water discharged through said apertures will strike said blocks, said blocks having rearwardly.tapering converg ing'faces to deflect laterally the'water projected against said faces.

18. In a pipe cleaning device, the combina tion of a plunger of flexible material for moving said device through a pipe by means i of liquid pressure in the pipe, and'spring plates engaging said plunger to hold the same against collapsing and having Scraping edges at the outer; ends thereof whlch are pressed into operative contact with the interior of said pipe by the-liquid pressure acting on said plunger. V

19. The combination of a pipe cleaning device and a plunger secured thereto for fi novingsa-id 1 device through a 'pi-pe, said plunger incl uding disk, spring plate seth'einte'rior of a pipe'to be cleaned, a nda IfC ured to said diskarrd extending rea'rward- I 1y and outwardly 1 therefrom and havmg.

sl-i arp'en'edend-portions adapted to engage 7'0 fie bie collarsecured at its inner-end to said diskand having its outer end extending beyond said spring plates o engage the pipe 20; The combination" of a pipe -1 cleaning device and a plungerf secured thereto-for "niovin g said device through a pipe, said piungei"inclurhnga' disk having a substanally ifrusto-conical edge portion, a plurality and extending rearwardly and outwardly therefrom, and a flexible collar havlng its inner end engaging said disk andhavmg its ,outer portion engaging the pipe to be cleaned, the intermediate portions of said collar being supported by said spring plates.

21. In a pipe cleaning device, the combination of a plunger secured theretofor moving-said device through a pipe, said plunger including a disk of rigid material, a plurality of spring plates secured to the periph- V eral portion of said disk and extending rear wardly and-outwardly therefrom, the ends of said plates being bent outwardly and sharpened to form cutting edges, and a fleX- ible collar having its inner end engaging said disk and having its outer portion extending beyond said spring plates for engaging the pipe, the pressure exerted on said plunger being ransmitted to said spring plates for pressing the cutting edges thereof againstsaid pipe. e I r 22. In a pipe cleaning device, the combination of a plunger for moving said device through a pipe by means of liquid pressure in the pipe, and a pressure controlled relief device in said plunger which normally prevents flow of liquid past said plunger and which may be acted 'upon by the pressure" of the liquid inrthe pipe. for permitting llO liquid to flow past said plunger in accordance openings in said plunger to'permit liquid' 7 to flow to said cleaning means, and pressure controlled valves which control said openings and which open in accordance withthe pressure acting on said plunger.

24. In a pipe cleaning device, the combination of a part having cleaning means mounted thereon, a plunger attached to said part for moving said device through a pipe jbyurneans of liquid. pressure'in the pipe, openings in said plunger to permit liquid to flow to said cleaning means, valves adapted to seat in said openings, and springs for yieldingly holding said valves on their seats against the pressure actlng on said' plunger, said springs permitting the valves to open when the" pressureacting on said plunger exceeds at 0814521111 minimum.

25. In a pipe cleaning device, the com- ,Which may be acted upon by the pressure of the liquid in the pipe'for permitting liquid to flow past's'aid plunger in accordance with the pressure of liquid acting on said plunger, 7 and plpe cleaning devices mounted in advance of said plunger and. to which liquid flowing past said plunger is directed.

26. The combination of a pipe cleaning device and a plunger secured to the rear end of said cleaning, device and adapted to be acted upon by liquid in'the pipe for TIlOVlllg said cleanlng device through the 1 pipe, avalve arranged on said plunger and:

permitting liquid to pass ahead of said )lun er to said 'cleanin device and means for yieldingly holding said valve in its] closed position, Wherebythe valve is opened in accordance With the pressure of llquid acting on said plunger."

' JOHN M. THOMPSON.

'WILLIABT THOMPSON. 

